I love my Vista and I have talked to several people who have had both and almost all have said they prefer the Vista over the Bug.
I haven't owned a Bug, but I find the Vista to be a great stroller. I have had people ask me if my stroller is a Bug, I am not a brand name dropper, so being able to say I own a Bug wasn't a big deal for me. It was more about reviews, features etc. I use my basket, especially living in Spokane. Just yesterdat the mall, DH, the 2 boys, and myself, all stuffed our winter coats (think parkas folks) in the basket, along with my Skip Hop Pronto (changer), my Beco Butterfly and Fleurville Sling Tote (only using names so you can get a visual of all I had in there). It all fit great. While I can hang the diaper bag from the stroller handle, it is hard to do with my DD facing me, and that is the way I have her riding all the time. I never fold my Vista with the seat attached, so weight isn't a huge deal. I drive a Yukon XL so I have plenty of cargo space, but I fold the frame and then set the seat on the frame in the back of my vehicle and it leaves me plenty of room for anything else I need to haul.
My only complaint would be the recline. Even in position 1, the seat does still seem a bit reclined and I notice my DD pulling herself up on the bumper bar.
Otherwise, NO complaints at all.